# Is a Styrofoam ball more dense than a rock?

## Is a Styrofoam ball more dense than a rock?

Density defined in a qualitative manner as the measure of the relative “heaviness” of objects with a constant volume. For example: A rock is obviously more dense than a crumpled piece of paper of the same size. A styrofoam cup is less dense than a ceramic cup. if a rock sinks, it is more dense than water.

How do you know what has a higher density?

If something is heavy for its size, it has a high density. If an object is light for its size it has a low density.

Why is styrofoam not dense?

It takes polystyrene with a density greater than water and expands it. Now the same mass occupies a much greater space due to all of the voids. This makes the styrofoam less dense and able to easily float.

### Does Styrofoam sink or float?

Styrofoam floats in water because it is less dense than water. This principle applies to all objects. That is, anything less dense than water will float, while anything more dense will sink….

Does Styrofoam have low density?

Substances with lower values are “less dense” and have particles that are more spread apart, like Styrofoam, or feathers. Density is a “characteristic property”.

Which item is more dense?

Students should realize that if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float. Remember that the density of water is about 1 g/cm3. Predict whether the following objects will sink or float.

## Do all metals have the same density?

The difference in density between different metals is usually bsed on the size and the mass of the atoms but the arrangement of the atoms in most metals is mostly the same. Most plastics are less dense than metal but can have similar density to wood.

What is the density of Styrofoam?

1.05 g/cm3
Polystyrene

Names
Density 0.96–1.05 g/cm3
Melting point ~ 240 °C (464 °F; 513 K) For Isotactic Polystyrene
Boiling point 430 °C (806 °F; 703 K) and depolymerizes
Solubility in water Insoluble

Does polystyrene have low density?

All forms of polystyrene are somewhat resistant to acids and bases, making them reliable for day-to-day usage. The foam variety of polystyrene is often referred to as Styrofoam. This foam is rigid but able to absorb and disperse significant pressure due to its structural strength and low density.

### How well does Styrofoam float?

Styrofoam works pretty well for floating on water. It isn’t very rigid, and it melts at a low temperature.

Why does the Styrofoam float?

You’ve all seen things float in water. This has to do with an object’s density, or how closely packed its matter is. If an object less dense than water, it will float in it.

What is the density of metals?

Density of Metals Material Density (ρ) kg/m 3 Tin 7,260 Titanium 4,520 Tungsten 19,450 Zinc 7,068

## What is the most dense metal in the world?

Most dense metals Silver – 10,49 gr/cm³: currency, jewelry, dentistry, photography Lead – 11,34 gr/cm³: used as electrodes in the process of electrolysis Palladium – 12,16 gr/cm³: catalytic converters; watch-making, production of surgical instruments

What is the density of chromium and cobalt?

The symbol for Chromium is Cr and its density g/cm 3 is 7.15. The symbol for Cobalt is Co and its density g/cm 3 is 8.86. The symbol for Copper is Cu and its density g/cm 3 is 8.96. The symbol for Dysprosium is Dy and its density g/cm 3 is 8.55.

What is the densest natural element on Earth?

Osmium is perhaps the densest naturally occurring element on the Earth, which belongs to the precious platinum group of metals. This shiny looking substance have as much as twice the density of lead, and slightly more than that of Iridium.